A quick update on my situation - I did a 32-mile ride yesterday morning wearing the new Sidi shoes...no other adjustments yet. I wanted to try the shoes again to see if the knee pain continues. It wasn't perfect, but certainly not as bad as it had been during the 2 previous rides. Maybe I just need a little "adjusting" time to get used to the new shoes? I did notice, however, that the bottoms of my feet were a tad bit tender....I think I need to look at a different insole because the stock Sidi one is way too flimsy and unsupportive. I plan on picking up a pair of Sole Slim Sport heat moldable insoles (which is what I have in my Northwave shoes) this weekend and see how that feels.